Installation Guide

Litenna  Installation Guide Optical Test Procedure
Foxcom Wireless Proprietary Information Document No.
42-93-005-23D
37
Foxcom Wireless System Characteristics
The Litenna
™
system consists of the following characteristics:
• Singlemode fiber
• Wavelength 1310nm
Fiberoptic Cable Measurement Tests
Cable can be measured through several procedures. This document describes the
following tests:
• Optical insertion loss measurement test
• Optical return loss measurement test
These tests are intended to be performed by technical personnel that deal with Foxcom
Wireless systems.
Other equipment can be used to perform these tests, however the results have to be the
same as will appear in the fiberoptic cable test results table (Table 7), at the end of this
document.
The insertion loss measurement determines whether the optical signal power travelling
the cable length is strong enough to be received by the photo diode, in the receiver.
Following the completion of the insertion loss test, the return loss test determines the
optical signal power that returns to the laser. The return power affects the laser,
changing the laser’s base current.
Test Equipment
In order to perform these tests, the following equipment is necessary:
➤ Light source (for wavelength 1310nm , 0dbm)
➤ Optical power meter
➤ Optical coupler (hosed and connectorized)
➤ Fiberoptic jumper
➤ Adapter parts for the cable connectors
For information about equipment suppliers, contact Foxcom Wireless.